Numerical Computational Fluid Dynamics-Based Models of Ultraviolet Disinfection Channels
Numerical Computational Fluid Dynamics-Based Models of Ultraviolet Disinfection Channels
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基于数值计算流体动力学的紫外线消毒通道模型
DOI：
10.1061/(asce)0733-9372(2005)131:6(838
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发表时间：
2005
影响因子：
2.2
通讯作者：
E. R. Blatchley
中科院分区：
文献类型：
--
作者：
D. Lyn;E. R. Blatchley
针对紫外线消毒系统研究了各种数值建模方法，这些方法均基于流场的计算流体动力学 (CFD) 解决方案，其中灯的方向垂直于流动方向。所有模拟均采用二维模型假设，并通过商业CFD软件（FIDAP）获得湍流解。研究了两种建模方法。采用连续欧拉方法来制定适当的平流扩散方程，该方程可求解活微生物浓度。另外，还研究了拉格朗日方法，其中将粒子以数字方式引入流中，并计算它们通过空间变化的紫外线强度场的轨迹。通过比较基于非定常流连续介质模型的时间平均结果与时间平均结果，检查了与涡流脱落和运动相关的非定常流特征对消毒程度的影响。
Various numerical modeling approaches, all based on computational fluid dynamics (CFD) solutions for the flow field, are studied for an ultraviolet disinfection system in which the lamps are oriented perpendicular to the flow direction. A two-dimensional model assumption is made in all simulations, for which turbulent flow solutions were obtained with commercial CFD software (FIDAP). Two modeling approaches were studied. A continuum Eulerian approach was taken in formulating an appropriate advection–diffusion equation which is solved for the viable micro-organism concentration. Alternatively, a Lagrangian approach, in which particles are numerically introduced into the flow and their trajectories through a spatially varying field of ultraviolet intensities were computed, was also investigated. The effect of modeling unsteady-flow features associated with vortex shedding and motion on the extent of disinfection was examined by comparing time-averaged results based on an unsteady-flow continuum model with t...